In 1973, due to population projections, a new Granite City High School North was opened on Illinois Route 203 and the school in the existing building was named Granite City High School South.

After only ten years, Granite City North was closed due to declining enrollment and the building sold to Belleville Area College.

Granite City South resumed using the current name.

[3] Granite City High School athletics teams are independent and do not compete in a conference.

The school colors are red, black and white, and the mascot is the Warrior.